3(3+4n)=81

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Solution for 3(3+4n)=81 equation: 


Simplifying
3(3 + 4n) = 81
(3 * 3 + 4n * 3) = 81
(9 + 12n) = 81

Solving
9 + 12n = 81

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + 12n = 81 + -9

Combine like terms: 9 + -9 = 0
0 + 12n = 81 + -9
12n = 81 + -9

Combine like terms: 81 + -9 = 72
12n = 72

Divide each side by '12'.
n = 6

Simplifying
n = 6

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